Serific
a. 制丝的
🗣️ 情景例句
No, I have to turn it in in the morning.
不行 ，明天上午我得交出去。
I can't believe it!
简直无法相信！
rising at one-foot intervals all the way to the top of the atmosphere.
并按1英尺的间隔从地面一直排列到大气层的顶端。